IE921031A1 - 0il pumps - Google Patents

0il pumps

Info

Publication number
IE921031A1
IE921031A1 IE103192A IE921031A IE921031A1 IE 921031 A1 IE921031 A1 IE 921031A1 IE 103192 A IE103192 A IE 103192A IE 921031 A IE921031 A IE 921031A IE 921031 A1 IE921031 A1 IE 921031A1
Authority
IE
Ireland
Prior art keywords
pump
bush
shaft
drive shaft
face
Prior art date
Application number
IE103192A
Other versions
IE73429B1 (en
Inventor
Steve Hodge
Original Assignee
Concentric Pumps Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Concentric Pumps Ltd filed Critical Concentric Pumps Ltd
Publication of IE921031A1 publication Critical patent/IE921031A1/en
Publication of IE73429B1 publication Critical patent/IE73429B1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/02Pressure lubrication using lubricating pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/60Mounting; Assembling; Disassembling
    • F04D29/605Mounting; Assembling; Disassembling specially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04PTFE [PolyTetraFluorEthylene]

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Rotary Pumps (AREA)
  • Fats And Perfumes (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

Oil pump manufacture is simplified by providing the pump body with a planar unstepped face and achieving radial location by the provision of a bush 22 (Fig.2) on the pump driven shaft 14, which bush is received in the counterbore 24 of the part journalling the drive shaft 16, i.e. the cylinder block adjacent the end of the drive shaft (crankshaft).

Description

This invention relates to oil pumps such as gerotor pumps primarily for i.e. engines.
In a typical layout, the drive shaft for the pump which may be the nose of the engine crankshaft - has a central splined or slotted bore to receive the splined or tang end of the driven shaft in the pump. This driven shaft projects through a pump body face, and that face mates with the engine block/sump and alignment is achieved by a circular formation or step machined in said face and a complementary step formation on the pump body. Radially outwardly of the step the face is apertured for securing bolts.
The object of the invention is to simplify manufacture .
According to the invention a pump of the kind described has a body with a planar unstepped face, and said driven shaft is journalled by a bush in a bore in the engine block or like, said bush projecting from said face and being used for pump alignment.
This eliminates one operation in machining the pump body .
Conveniently the bush is one coated with or impregnated with a low friction material such as PTFE which is effective in the bore of the bush in order to journal the driven shaft.
This driven shaft is usually a problem for lubrication, involving either a bleed of pumped lubricant or splash from the sump, both of which are unsatisfactory: thus the pumped lubricant is at this point (i.e. in the pump) unfiltered, because the lubricant circuit goes from pump to main filter and only then to points to be lubricated, so that if this bush is to be supplied with filtered lubricant, an extra delivery gallery is required duplicating the one from the pump to the filter, and simply returning a proportion to the pump shaft. That is considered to be an undesirable complication. The splash alternative primarily relies upon oil mist in the sump reaching the shaft, and is found in practice to be unreliable.
The PTFE impregnated bush has been known per se for very many years but has never been used for this purpose, as far as is known to the inventor. The use is surprising and non-obvious. The combination of solving the lubrication problem for the oil pump driven shaft and use of the same bush to simplify pump body machining by providing location in use is an important advantage for the invention .
The invention is now more particularly described with reference to the accompanying drawings wherein:Figure 1 is a diagrammatic sectional elevation showing the prior art arrangement: Figure 2 is similar to Figure 1 but showing the invention .
Turning first to Figure 1, the pump comprises a body 10 housing a pump set 12, in this example a gerotor set, and the body is provided with appropriate inlet and outlet ports for the lubricant to be circulated by the pump. The pump has a driven shaft 14 keyed or like angularly fast with a drive shaft 16 which may be the crankshaft of the engine, and the shaft is journalled in bush 21 in the body.
In order to align the pump with the end of shaft 16, a recess or shoulder 18 which is precisely concentric with the shaft axis is machined in the part 20. The pump body has a complementary stepped face which is likewise precisely concentric to the shaft axis. In addition the pump body is provided with holes for bolts and the part 20 is likewise provided with screw tapped apertures to receive those bolts.
Turning now to the invention in Figure 2, the pump body is made planar instead of being stepped, and the part 20 is likewise planar. The pump drive shaft 14 now has a bush 22 which is received in the bore 24 in order to align the shaft 14 with the shaft 16. The pump body is therefore self locating. It may be clamped in place by bolts passing through enlarged apertures in the pump body flange 26 and into screw-tapped apertures in the part 20 in the usual way.

Claims (3)

1. An oil pump for an i.e. engine having a drive shaft for co-axial connection to the driven shaft of the pump, in which said driven shaft has a bush journalled in a bore co-axial with and juxtaposed with said drive shaft, and the pump body has a planar unstepped face for clamping to the engine in a radial position determined by said bore.
2. A pump as claimed in Claim 1 wherein said bush is coated or impregnated with low friction material.
3. A pump as described with reference to Figure 2 of the accompanying drawings.
IE921031A 1991-04-02 1992-04-01 Oil pumps IE73429B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919106807A GB9106807D0 (en) 1991-04-02 1991-04-02 Oil pumps

Publications (2)

Publication Number Publication Date
IE921031A1 true IE921031A1 (en) 1992-10-07
IE73429B1 IE73429B1 (en) 1997-06-04

Family

ID=10692464

Family Applications (1)

Application Number Title Priority Date Filing Date
IE921031A IE73429B1 (en) 1991-04-02 1992-04-01 Oil pumps

Country Status (10)

Country Link
US (1) US5271723A (en)
EP (1) EP0507512B1 (en)
JP (1) JPH0674013A (en)
AT (1) ATE124500T1 (en)
DE (1) DE69203133T2 (en)
DK (1) DK0507512T3 (en)
ES (1) ES2075615T3 (en)
GB (2) GB9106807D0 (en)
GR (1) GR3017370T3 (en)
IE (1) IE73429B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3413444B2 (en) * 1995-10-31 2003-06-03 ヤマハマリン株式会社 4 cycle engine for outboard motor
DE19712872A1 (en) * 1997-03-27 1998-10-01 Bosch Gmbh Robert Pump, in particular high-pressure pump for a fuel injection device of an internal combustion engine
DE19857560A1 (en) 1997-12-23 1999-06-24 Luk Fahrzeug Hydraulik Pump unit without own bearing
CN105500255B (en) * 2016-01-20 2017-03-22 大丰市海纳机械有限公司 Floating supporting structure for assembling of cooling water pump of automobile engine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2020224A (en) * 1930-09-30 1935-11-05 Eclipse Aviat Corp Internal combustion engine
US1955383A (en) * 1932-12-01 1934-04-17 Hermann John Frederick Injection pump for internal combustion engines
US3211483A (en) * 1959-12-10 1965-10-12 Gen Motors Corp Ball joint and socket assembly
US3115096A (en) * 1960-02-03 1963-12-24 Jonkopings Mek Werkstads Ab Pump unit
DE2259117C2 (en) * 1972-12-02 1975-01-09 Danfoss A/S, Nordborg (Daenemark) Parallel and internal-axis rotary piston machine
DE2511127A1 (en) * 1975-03-14 1976-09-30 Bosch Gmbh Robert GEAR MACHINE
JPS57110787A (en) * 1980-12-27 1982-07-09 Kayaba Ind Co Ltd Vane pump
IT1184924B (en) * 1985-03-22 1987-10-28 Weber Spa ELECTRICALLY OPERATED FUEL PUMP
DE3620705A1 (en) * 1986-06-20 1987-12-23 Schwaebische Huettenwerke Gmbh Internal gear wheel pump as lubricating oil pump
DE3923019A1 (en) * 1989-07-12 1991-01-17 Bayerische Motoren Werke Ag PUMP ARRANGEMENT ON A MACHINE, IN PARTICULAR LUBRICANT OIL PUMP ON A INTERNAL COMBUSTION ENGINE

Also Published As

Publication number Publication date
US5271723A (en) 1993-12-21
DE69203133D1 (en) 1995-08-03
GR3017370T3 (en) 1995-12-31
EP0507512B1 (en) 1995-06-28
GB9106807D0 (en) 1991-05-22
DE69203133T2 (en) 1995-11-02
GB9206749D0 (en) 1992-05-13
EP0507512A1 (en) 1992-10-07
GB2255377B (en) 1994-09-21
IE73429B1 (en) 1997-06-04
GB2255377A (en) 1992-11-04
ATE124500T1 (en) 1995-07-15
ES2075615T3 (en) 1995-10-01
DK0507512T3 (en) 1995-10-30
JPH0674013A (en) 1994-03-15

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Legal Events

Date Code Title Description
MM4A Patent lapsed